O Memory - Testing with Simobject

The memory manager is still a mistery to me. I wrote some small test scripts which can be paste on console and the result is: where is my memory gone? I did not make a leak test for it because I'am using simple SimObjects which should be clean from leaks ?!


The test and the used memory - tested it on dedicated server:

Mem: 59368

for ($j=0;$j<100;$j++) {$u="testo"@$j; new SimObject($u);for ($i=0;$i<1000;$i++) $u.setfieldvalue($u@"XXX" @ $i, $u@"XXXX" @ $i);}

Mem: 66380

for ($j=0;$j<100;$j++) {$u="testo"@$j; $u.delete();}

Mem: 66388 ... 8 bytes gone for delete ?

for ($j=100;$j<200;$j++) {$u="testo"@$j; new SimObject($u);for ($i=0;$i<1000;$i++) $u.setfieldvalue($u@"XXX" @ $i, $u@"XXXX" @ $i);}

Mem: 68748

for ($j=100;$j<200;$j++) {$u="testo"@$j; $u.delete();}

Mem: 68760

for ($j=200;$j<300;$j++) {$u="testo"@$j; new SimObject($u);for ($i=0;$i<1000;$i++) $u.setfieldvalue($u@"XXX" @ $i, $u@"XXXX" @ $i);}

Mem: 72516

for ($j=200;$j<300;$j++) {$u="testo"@$j; $u.delete();}

Mem: 72520

The next test make the real curiosity. I know strings are cached and not allways the memory is released but the next loop should use no extra memory but ....

for ($j=0;$j<300;$j++) {$u="testo"@$j; new SimObject($u);for ($i=0;$i<1000;$i++) $u.setfieldvalue($u@"XXX" @ $i, $u@"XXXX" @ $i);}

Mem: 81176 !!!!!!!!

for ($j=0;$j<300;$j++) {$u="testo"@$j; $u.delete();}

Mem: 81192


Thats really a bad thing when working on a mmo and handling a lot of data like user stats.